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By accidentally short-circuiting Professor Bullfinch's new crystalline material, Danny enables the professor to create a new machine which can make people invisible, but the military sees it as a useful weapon and Danny has to find a way to prevent exploitation.
Featured Series
12 primary booksDanny Dunn is a 12-book series with 12 primary works first released in -350 with contributions by Jay Williams, Raymond Abrashkin, and Ezra Jack Keats. The next book is scheduled for release on Invalid Date.
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